The language of Denmark is Danish. It is the native language of pretty well the entire population and is the sole language for official purposes. Of c. 20,000 pro-German Danish citizens in Southern Jutland, about two thirds speak Danish at home, even though this minority cultivates German to reflect its identity. Neither foreign citizens resident in Denmark (c. 265,000 in 1997) nor immigrants who have obtained Danish citizenship have so far had any demonstrable influence on the Danish language.
We won't try to teach you "Danish in 10 sentences". Danish is perhaps the most difficult northern European language for relating the written word to speech; it's almost impossible to pronounce simply by reading the words, as many syllables are swallowed rather than spoken.
English is very widely spoken and understood: you can almost always get by with just English. German is the second foreign language with French coming in third.
